Rewirable metal screen



July 29 1924. 1,592,693

F.A. STICKLE REWIRABLE METAL SCREEN Filed July 25. 1921 Mt Q. JAE-MATTOR/VfY-S.

Patented duty 29, I924.

STATES r'ra'r OFFIE.

FREDERICK A. STIOKLE, F CINCINNATI, OHIO, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE LUNKENHEIJIER COMPANY, OF CINCINNATI, OHIO, ACGRPQRATION OF OHIO.

REWIRABLE METAL SCREEN.

Application filed July 25, 1921.

To all whom it may concern Be it known that I, F REDERICK A. STIoKLE, acitizen of the United States, and a resident of Cincinnati, in thecounty of Hamilton and State of Ohio, have invented certain new anduseful Improvements in Rewirable Metal Screens, of which the followingis a full, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification.

My invention relates to rewirable metal screens, wherein the frames areof metal and the screen wire is demountably held within a channelrunning longitudinally of the frame members.

I11 the metal screen art, where a wire retaining channel is preservedalong the inside of the metal frames, it has been the problem tomaintain a neat appearance, keep down the size of the frame and at thesame time have a frame which will not be easily distorted.

The solution of this problem which has gained a scendency in the marketof today is the use of frame pieces having a tubular body with one ofthe webs making up the tube or both of them extended to form "a wireretaining channel.

The production of a closed tubular body portion has difficulties inconnection with enameling and requires welding, riveting or soldering,all of which costs money. i It is quite simple, however, to hold theframe pieces at the corners, and the appearance is good, so that at thepresent time this tubular form has been widely adopted.

The stiffness of the frame breaks down chiefly at the corners, and theproblem with which my invention deals is the production of a frame ofnon-tubular nature and without seams, and yet which can be tightlysecured at the corners, and which if desired can be shipped in lengthsto be cut, and riveted or welded together on the job.

I accomplish the solution of said problem and other advantages to benoted, by that certain construction and arrangement of parts to behereinafter more specifically pointed out and claimed.

In the drawings,

Figure 1 is an elevation of a completed Serial No. 487,512.

screen construction according to my invention.

Figure 2 is a detail section taken through one of the frame pieces onthe line 22' of Figure 1.

F igure3 is a detail elevation on a larger scale of one of the corners.

Figure 4 is a section of a modification, being same view as Figure 1.

Figure 5 is a detail of the spline to be used with the modification.

The frame pieces making up my screen are formed of strips of metalpassed through rolls, or otherwise bent to form outer channels 1, whichwill face inwardly of the completed article, median channels 2, whichwill face outwardly of the completed screen, and screen wire channels 3,which will face inwardly again.

In making up the frame, the pieces are arranged of the desired size fortop, bottom, and sides, and mitred at the points where the corners areto be formed, as at 4. Corner irons of angle shapes are provided, theirons 6 adapted to fit the median channels, and the irons 5 to fit theouter channels.

When the frame pieces have been set together, one set of irons will beriveted or welded into the channels facing the operator around theframe, and then the frame turned over and the other set of irons mountedin the same way. I wish to note particularly that inwardly and outwardlyare used by me for convenience in expressing relative position and notas limitations either in the specification or claims, since the termsare intended to eX- press the position of the parts to an observerlooking at the screen on the side that the wire is mounted.

The corners will then be braced on both sides by stiffening irons, whichare solid at the corners, so that all distortion at the corners isentirely done away with. If the frame pieces were not engaged on both'sides, then it would not be possible in ordinary practice to preventdistortion upon certain of the usual strains to which scree frames aresubjected. 100

After the corners have been made secure, the entire frame will be dippedin enamel and baked to any desired degree of temperature, with everyassurance of the enamel covering all points of the frames. In tubularframes it is not possible to enamelthe frames inside and outside afterthe corners have been secured. Furthermore in tubular frames, handlesmust be provided, whereas channel can be driven into it without cut tingthe screen wire. The wire will score the lead but unlike any othersplines with which I am familiar there is no chance of cutting thescreening when inserting the spline.

As shown in Figure 2, it is possible and where a non-plastic spline isused I find it desirable to leave a. lip 8 on the inner wall of the wirehannel 3 so that this can be pinched over the spline when it has beeninserted together with the wire.

A pair of pincers can be inserted with one finger in the channels 2 withthe other finger resting against the lip on the outside v of the innerwall of the channel 3 and the lip turned over without bend ing out ofshape any of the rest of the frame.

The spline will preferably be of solid character and not a spring strip,which is not reliable, and the extent of the pinching in of thelip 8will depend upon the nature of the metal of the frame and the nature ofthe material of the spline.

As a modification of the above, where a very narrow screen frame isdesired, the

- serted and secured in the channels 2 thickness of the corner iron willbe allowed for in sinking the spl ne into the channel 3.

This modification will not be as strong as the preferredform firstdescribed, since the presence of a multiple of bends or corrugations ina metal strip adds greatly to its stiffness in resisting torsionalstrains in all directions and the triple bent frame piece of myinvention is very stout and even when made of fairly thin gauge metal.

Spot welding is preferred as a means of mounting the corner irons in anyinstance, since the enameling covers the weld and gives to the finalproduct a handsome and ornamental appearance which would be slightlymarred by the presence of the nob formed by the enameling over of thehead of a rivet. c

The means adopted for mounting the wire in the screen frames is not oneof the essentials of my invention, as any known method practiced atpresent will serve'my purpose.

Gne advantage from the manufacturing point of view of my screen is thatthe frame pieces can be reversed in position when making up the frame.Thus if a piece, when it is about to be assembled into the frame has adistortion in it, the operator can reverse its edgewise position toavoid rejecting the piece. A piece coming from the forming rolls islikely to have a bend in it, and to assemble a piece with an outwardbend in a frame tends to weaken the frame and make a difficult job ofmaking up the article.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A rewirable screen frame, comprising frame pieces of nontubularconstruction formed into a plurality of channels facngin differentdirections, one of said channels located interiorly of the frame for usein mounting wire therein, and corner irons for securing ends of theframe pieces together, comprising angle plates set into atleast'twochannels fac'ng opposite sides of the frame pieces, and securelyfastened in said channels.

2. A 'rewirable screen frame, comprising frame pieces of nontubularconstruction.

formed into a plurality of channels, one channel facing inwardly of thecompleted screen for use in mounting the wire, one channel facingoutwardly, and another channel facing inwardly at the edge of the frame,corner irons adapted to lit the two channels other than that for thewire, said frame pieces being mitred at the corners and set together,and the irons securely mounted and fixed in the corners. r

8. A rewirable screen frame, comprising frame pieces of nontnbularconstruction formed into a plurality of channels, one channel facinginwardly of the completed screen for use in mounting the wire, onechannel facing outwardly, and another channel facing inwardly at theedge of the frame, corner irons adapted to lit the two channels otherthan that for the wire, said frame pieces being mitred at the cornersand set together, and the irons securely mounted and fixed in thecorners, said frame as reinforced being protectedby a baked enamel.

4. A rewirable screen frame, compris ng nontubular metal strips bent toform narrow channels for mounting the screen wire, wide rectangularchannels facing in the opposite direction to form the main body of theframe, and narrow outer channels facing with the wire channels, cornerirons adapted to fit the two channels other than that for the wire, saidframe p'eces being niitred at the corners and set together, and theirons securely mounted and fixed in the corners.

5. A rewirable screen frame, comprising frame pieces of, nontubularconstruction formed into a plurality of channels, one channel facinginwardly of the completed screen for use in mounting the wire, onechannel facing outwardly, and another channel facing inwardly at theedge of the frame.

FREDERICK A. STICKLE.

